Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ec948dd89b50b2122d9fab7525fb2e9d0e53568ea3bc305e93583ce3473f076' 
  AND token = 'SwBmQwgaw0xT2vFYFvahY+SODFP9xGIk0eblzL8bHbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}